/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.codeInsight.editorActions.smartEnter;

import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiThrowStatement;
import com.intellij.util.IncorrectOperationException;

@SuppressWarnings({"HardCodedStringLiteral"})
public class MissingThrowExpressionFixer implements Fixer {
  @Override
  public void apply(Editor editor, JavaSmartEnterProcessor processor, PsiElement psiElement)
      throws IncorrectOperationException {
    if (psiElement instanceof PsiThrowStatement) {
      PsiThrowStatement throwStatement = (PsiThrowStatement) psiElement;
      if (throwStatement.getException() != null &&
          startLine(editor, throwStatement) == startLine(editor, throwStatement.getException())) {
        return;
      }

      final int startOffset = throwStatement.getTextRange().getStartOffset();
      if (throwStatement.getException() != null) {
        editor.getDocument().insertString(startOffset + "throw".length(), ";");
      }
      processor.registerUnresolvedError(startOffset + "throw".length());
    }
  }

  private int startLine(Editor editor, PsiElement psiElement) {
    return editor.getDocument().getLineNumber(psiElement.getTextRange().getStartOffset());
  }
}
